> I don't have a C standard handy, but it's been suggested to me in
> private mail that a compiler could choose to use -1 as the value of an
> equality boolean value.

I don't have this standard either, but I very much doubt that the standard
allows this. This would be totally insane. I would immediately stop using any
compiler that would do this, ANSI C or not.
--
ws@TooLs.DE     (Wolfgang Solfrank, TooLs GmbH) 	+49-228-985800